SU448880A1 - Apparatus for producing a liquid droplet or melt - Google Patents

Description

The invention relates to a device for producing liquid droplets or melts and can be used in plants for producing granules of ammonium nitrate, urea, complex fertilizers and sulfur.

A device for producing liquid droplets or melts is known, made in the form of a chamber with a nozzle for feeding the melt and a perforated flat or bowl-shaped bottom.

However, when operating at low pressures, the rate of melt flow from the lower holes of the chamber with a bowl-shaped bottom is significantly higher than the flow rate from the upper holes, which results in granules of a non-uniform size.

The known device with a flat perforated bottom allows the process to be carried out over a wider range of loads, but due to the deterioration of heat exchange conditions in a vertical, narrow torch of granules, the granules stick together in flight and stick to the walls of the apparatus.

The purpose of the invention, the elimination of these disadvantages, is achieved by providing the bottom with corrugations, the holes in which are located at the same level and at an angle to the vertical, increasing from the center to the periphery of the bottom.

Corrugations usually have the form of concentric annular surfaces located at different angles to the horizon. In addition, the device can be equipped with a vibrator.

The drawing shows a vertical section of the proposed device.

The device consists of a vibrator 1 containing a holder 2 from a ball bearing, a tangential nozzle 3 for supplying compressed air, a steel ball 4 freely placed in the treadmill of the holder 2, resonator plates 5, fastening plates 6, bolts 7, clamp 8 for fastening, rod- a wave guide 9 attached by a nut 10 to the bottom of a corrugated perforated bottom 11 with holes 12 for the flow of the flow. The mouth of the holes are located in the same horizontal plane, but at different angles to the vertical. On the cover 13, there are additional vibrators 14 for creating torsional vibrations when working with a melt containing a large amount of sludge particles; the nozzle 15 serves to supply water

into the device, and the grids 16 and 17 are designed to evenly distribute the melt in front of the outflow openings and to laminarise the melt. Pipe 18 is designed to remove gases from the device. Flanges 19 and

The flange 21 serves to mount the device in an apparatus, for example, on a granulation tower.

The device works as follows.

The melt (liquid) through the nozzle 15 enters the device, passes through the grids 16 and 17, and through the holes 12 in the bottom And expires in the form of jets into the granulation bashpyu or apparatus at different angles to the horizon. Since the mouths of the openings 12 are located in the same horizontal plane, and their axes are at different angles to the vertical, increasing 01 center to the periphery, when working on any head, the flow rate of flow from all the holes is identical, and the spray torch will expand, which improves heat transfer and prevents sticking. Raaul in flight.

1 As the flow rate of the melt flux from all the holes is the same, when the vibrator 1, which informs the central part of the bottom 11 oscillates at a given stable frequency, disturbances of the same wavelength will be superimposed on the jets of the melt. This will lead to the fragmentation of all jets into strictly uniform droplets under any loads.

Compressed air is fed to the vibrator 1 through the tangential nozzle 3. Interacting with the ball 4, the air whirl draws the ball into rotational motion. The resulting centrifugal force through the rod-waveguide 9 acts on the central part of the bottom 11 without holes, made of an elastic metal and is a membrane. With oscillations of the central part of the bottom, elastic waves propagate in the melt filling the device and along the corrugated bottom, resulting in the formation of regular perturbations on the jets of the melt, which leads to the disintegration of the jets into strictly uniform droplets.

Instead of a pneumatic ball vibrator, you can use any known vibrator with a suitable frequency.

When using a ball vibrator to stabilize and match the frequency of operation of the vibrator with the optimal Rayleigh frequency, two or more plates of 5 resonators designed for different frequencies are provided.

The ball vibrator is tuned to the frequency of one of the resonators (depending on the pressure of compressed air supplied to the socket 3). The air pressure in front of the nozzle 3 can be changed, the jet perturbation frequency can be changed, which is necessary when the flow pressure in front of the openings 12 changes more than twice.

The application of the proposed device allows obtaining equal-sized granules at different loads, reducing the size of granulation structures and intensifying the granulation process. In addition, they allow to operate on torsional vibrations using vibrators 14 installed eccentrically to the center of mass of the device.

Subject invention

Claims (3)

1. A device for receiving liquid droplets or melts, made in the form of a chamber with a nozzle for supplying the melt and a perforated bottom, characterized in that, in order to obtain uniform drops when operating in a wide range of loads, the bottom is provided with corrugations, the holes in which are located one level and under angle to vertical, increasing from the center to the periphery of the bottom. 2. The device according to claim 1, characterized in that the corrugations have the shape of copentric annular surfaces located under different angles to the horizon. 3. The device according to claim 1, which is based on the fact that it is spabed by a vibrator. , 15 i /////) A M V //////// 7 7 / / / / /. G8fi ///////// 7 ///// Л